1. Department of Conservative Nursing , Medical University of Łódź , Poland
2. Department of General and Colorectal Surgery , Medical University of Łódź , Poland
3. Department of Surgery , McGill University , Montreal , Canada
4. Department of Gastrointestinal Diseases , University Clinical Hospital No.1 in Łodz , Medical University of Łódź , Poland
5. Department of Gastroenterology , University Clinical Hospital , Medical University of Łódź , Poland